SS bias need not ever (almost ever) be adjusted if no rail caps or output devices are replaced during the normal lifespan of an amplifier, or if there is no trim pot drift/failure.
Once upon a time you would find the bias procedure and values in the owner’s manual but today almost everything comes with a warranty and/or the manufacturer’s lawyers advise "No User Serviceable Parts Inside".
Once upon a time you would find the bias procedure and values in the owner’s manual but today almost everything comes with a warranty and/or the manufacturer’s lawyers advise "No User Serviceable Parts Inside".